Local models of Gauge Mediated Supersymmetry Breaking in String Theory

TL;DR

This paper constructs explicit local string theory models with separated singularities hosting D-branes, leading to gauge mediated supersymmetry breaking with calculable messenger sectors and UV insensitivity.

Contribution

It provides explicit local Calabi-Yau models with chiral sectors and supersymmetry breaking, enabling detailed computation of messenger sectors using dimer techniques.

Findings

Realization of gauge mediated supersymmetry breaking in string theory.

Explicit models with MSSM-like visible sector and metastable SUSY breaking.

UV insensitivity of the mediation mechanism is demonstrated.

Abstract

We describe local Calabi-Yau geometries with two isolated singularities at which systems of D3- and D7-branes are located, leading to chiral sectors corresponding to a semi-realistic visible sector and a hidden sector with dynamical supersymmetry breaking. We provide explicit models with a 3-family MSSM-like visible sector, and a hidden sector breaking supersymmetry at a meta-stable minimum. For singularities separated by a distance smaller than the string scale, this construction leads to a simple realization of gauge mediated supersymmetry breaking in string theory. The models are simple enough to allow the explicit computation of the massive messenger sector, using dimer techniques for branes at singularities. The local character of the configurations makes manifest the UV insensitivity of the supersymmetry breaking mediation.